Hi blinddog1,
Thank you for using the Support Forum. Please take a look at the article for streaks from the online support for your printer. If the article does not help please consider contacting your support centre for further assistance.
I am getting these diagonal black streaks in everything, it gets better then gets worse. The printer has been making a loud screaching noise when it prints for a while, now it's doing this. I changed toners, changed the black imaging unit, and finally changed the belt cleaner. When I changed the belt cleaner the screaching sound went away instantly but the black streaks continued. It got better then continued to get worse again. I printed about 40-50 sheets. Any help out there? Thanks.